Java 中的 BufferedWriter close()方法，示例
原文:https://www . geeksforgeeks . org/bufferedwriter-close-method-in-Java-with-examples/
Java 中 BufferedWriter 类的 close() 方法用于从缓冲流中刷新字符，然后将其关闭。一旦流关闭，进一步调用 write()和 append()等方法将引发异常。
语法:
public void close()
参数:此方法不接受任何参数。
返回值:此方法不返回值。
异常:如果出现输入输出错误，该方法抛出异常。
下面的程序说明了 IO 包中 BufferedWriter 类中的 close()方法:
程序 1:
// Java program to illustrate
// BufferedWriter close() method
import java.io.*;
public class GFG {
public static void main(String[] args)
{
try {
// Create the string Writer
StringWriter stringWriter
= new StringWriter();
// Convert stringWriter to
// bufferedWriter
BufferedWriter buffWriter
= new BufferedWriter(
stringWriter);
// Write "GEEKS" to buffered writer
buffWriter.write(
"GEEKSFORGEEKS", 0, 5);
// Close the buffered writer
buffWriter.close();
System.out.println(
stringWriter.getBuffer());
}
catch (Exception e) {
System.out.println(
"BufferedWriter is closed");
}
}
}
输出:
GEEKS
程序二:
// Java program to illustrate
// BufferedWriter close() method
import java.io.*;
public class GFG {
public static void main(String[] args)
{
try {
// Create the string Writer
StringWriter stringWriter
= new StringWriter();
// Convert stringWriter to
// bufferedWriter
BufferedWriter buffWriter
= new BufferedWriter(
stringWriter);
// Write "GEEKS" to buffered writer
buffWriter.write(
"GEEKSFORGEEKS", 0, 5);
// Close the buffered writer
buffWriter.close();
System.out.println(
stringWriter.getBuffer());
// It will throw exception
buffWriter.write(
"GEEKSFORGEEKS", 5, 8);
}
catch (Exception e) {
System.out.println(
"BufferedWriter is closed");
}
}
}
输出:
GEEKS
BufferedWriter is closed
参考:https://docs . Oracle . com/javase/7/docs/API/Java/io/bufferedwriter . html # close()
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